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makvit [3.9K]
3 years ago
8

Which one is the answer?​

Biology
2 answers:
Kazeer [188]3 years ago
7 0

Answer:

C. It’s impossible because think about it we don’t have good/ great enough data to explain or prove which is older

Explanation:

Tju [1.3M]3 years ago
7 0
It’s Definitely C I Just Did That
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The base pairs in a DNA strand are held together with hydrogen bonds. If the two nitrogenous bases in each pair were held togeth
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Hi,
I think the answer is the third one.

I hope this helps. If you’d like further explanation please let me know. Also, English is not my first language, so I’m sorry for any mistakes.
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Limitation of comparative investigation is that when it is done on a huge population, huge amount cost is required.

Explanation:Benefit of comparative investigation is that we can get descrete information about specific breed or species. It is important for the study of behaviour of many organisms. The working and behaviour of various natural aspects can be found.

Many natural phenomenon has been found by this method. Some are discovered. it helps a lot in the development of science and technology. In this method, results are very accurate.

Limitation of comparative investigation is that when it is done on a huge population, huge amount cost is required. Example, whhen it is done on humans. There population is around 7.3 billion in planet earth. So, this task require a huge amount of money and time as compared with other methods.

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2 years ago
A restriction enzyme has a 4 bp recognition sequence. Assuming equal frequency of all four bases in a 5,000 bp linear section of
I am Lyosha [343]

Answer: 20 fragments

Explanation:

This particular restriction enzyme has a 4 bp (base pair) recognition sequence therefore it will cleave once every 4ⁿ bases where n indicates the number pf bases in the recognition sequence.

  • The recognition sequence is 4 bp therefore this restriction enzyme cleaves once every 4⁴ = 256 bases. This is the length of the restriction fragment.
  • Calculate the number of fragments by dividing the total number of bases ( where you assume equal frequency of bases ie. A+T = C+G) by the length of the restriction base.
  • therefore 5000bp/256bp = <u>19,53</u> now this number ca n be rounded up to 20.
  • The expected number of fragments on the electrophoresis gel will be 20 fragments.

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